Sheet or tin furnace



Sept. 22, 1925. Q

Filed oc&` a. 1923 h the annexed. drwngs &ndin part indicated. i

Patented Sept. 22, 1925.

PATENT UiM-;mo Sir a/&ree

` GEORGE CLARK neoWN, OL-WARR N; orno.

L SHEE' on XTIN FURNACE.

Aplctioi fi1ed..0ctober 8, 1923. Serial No. 667392.

`and. useful ImproVements Sheet or` Tin Furnaces, ofwhich zthelfoll owi ng is a specii fioation.

This intention .relatesto nproveinents in iurnaces and more particilarly to sheet or plate heating fnrneces-using powdered ooal asfuel.) W

' In heating sheet `or, platesof t1n,sheet steel, black plates and the"like in fnrnaces of this type, ithns been found that pirticles of the owdered: oojal and dust perticles are held in suspension :through the Varionsfconbustion ehambers-in a non-igntedstate, and

are carrecl t0,: and. embedded in the platesor sheets beng lheated, fornii ng thereon tr pit ted and 'uneven surface; `llurrng the pickling; ,process,:prior. to the tin `plate bath or ;terne ,plate bath, the picric aeid decomposes or eatsaway tle jembedded col ja nd dust pa 'tioles i there'om leaving the plate with' a fpitted zor ooh-marked tsurfaee. This condition, fol" course, results n very serious, ds-

advantages as a ifplate zor sheet so 'pitted is considered of interier quality.

" :Tlenan object oflmy invention is to pro- "vden fnrnacein :which a sheet or` platetof tin sheetsteel or the like may beflhezted to i `produce e clean and. &Yell surface.

further object of myinvention is to pro- Vide a ;nrnaee .Whichdelivers a clean and pre fianetothe sheet orplate tobe heated and therebyflprevents: thel partcles being embedded theren.

:Another object"otiny inventionxis to proeiency in use e `A still further objeot'isto provide a 'furi nace structure and arrangementwhich in- "thebrdge 8 i ment. A

creases the efiecti'veness of thexfnnctioning thereof'and to anaterl degree l m ts any Waste incident to the use thjereof.

A further object is to provide a urnaoe which is smplea'nd practcalin design, efficient in operation and one which ,is easily `accessible' for cleaning or repar purposes.

Other ob ects Wlll belin` part obvous froni froni the.` following analysis of the invention; v

The inventon acoordinglyconsists in the i :features of Construction, ,combinaton1i` of parts, and in the unque ,relatontof ihe varousnembers and the relative 'proportioni ng and dispostoning thereoflell. as

inore clearly ontlned herein.

A To enable others skilledin ,the artto :Eully comprehend the underlyingr featuresthereo", in order that they ma y enbodythe sende, by numerous nodifiotions in 'structure andrelation-contenplated by this invention, draW- t ings depioting the preferred forms have been anneed' as part of this disolosnre enatin jsuch drawings, like characters `oiireferenee ndcte correspondng parts 'throughout all the views, of whch Eignre lis a vlongitudinal Sectionof my improved furnace structure;and t I Fgure 2 s a modfieaton of the arrange- :inent of' the bztflie plates.

` With reference ;to Eigure 1 e furnaee 1 of the usual type .1S shownflhaving a Ini' ing l or ignitonehamber 2. and& bridge. orhafile vall ljhe pulverized fnel, which; in, ,this nstance, ;s powdered coahis .fedintothe oh-ambel 2, through the tube 4:, either by means of a mechanioal stoker or by neansof oon pressed a r, and gn tonpf some of the 'particles of coal there takes place; A pri ..mary ,coinlmstion ohamber 5 is., proided opening into a: secondary lcomblstion, chamber' G'thrOnghthe opening 7 :in a bridge all 8. v i

jArranged on the rearwll of the furnace L and extendng tr,zmsverslely` ,across the same et e As lightl y `higher elevetion than ,the open- V ing 7 in ,the bridge 8" is a. bafiewallwwheh isdefiected clownwardly at an angle less than t the horizontal and forms With the rear wall vicle in &heatingurneeeian arrangement which fnrthers ti more complete conbuston "of ithe fuel andwhieh resultsin a high effien acute angledpocket. Positonedetthe nner end of thisbafiie Wall. is the upwardly extendng portion ll. A second battle l2 is i. positioned on the bridge 8 at. a, suitable` distance above the .upraised portion 11 and is also cleflecteddownwardly and formswith The bridge 8 extends for ztportionof the height of ,the furnaoe over which bridgeihe gases are led into a, heating comprtment 13, and defieoted outnardly by .sin eroll l l` on the bridge 8.

`The plates or. sheets to -be heated are e' second pocketingiarrangechannel bar 17. A suitable table or runway 18 is provided outside of the door acting as a support or guideway for the plates prior to their entry into ,the heating compartment 13, and also provides a support by which the plates can readily be removed.

A pipe 22 having a suitable valve control is positioned outside of the furnace 1 and adjacent to 'the door 14 by which air or steam 'from any suitable source may be utilized to clean the plates or sheets of any dust or foreign substances thereon before their entry into the furnace or to clean the packs while in the furnace before the latter is thoroughly heated.

A flue 19 is provided near the front of the furnace whereby the eXhaust gas or gases of combustion maybe directed from the furnace.

Clean-out doors 20 and 21 are provided in the secondary combustion chamber 6, the door 20 being positioned at the bottom thereof and the door 21 arranged at the upper surface of the baffie plate 10 whereby dust particles or unignited fuel particles deflected by the baffles 10 and 12 may be readily removed.

In F igure 2, I have shown a modification of my arrangement of baffle plates and have provided an alternative constructon in which the baflie plates have a curved arc of deflection to pocket and deflect the flame and hot combustible gases.

The operation, of course, is evident from the above. It is seen, however, that the powdered coal fed through the tube 4: is partially ignited in the miXing and ignition chamber 2, and the flameis directed upwardly and rearwardly by the baflie wall 3 into the primary combustion chamber 5. Some of the unignited fuel particles are arrested by the baffle plate 3 and dropback to be ignited by the upcoming flame or to be deposited at the base of the ignition chamber from whence they can be easily removed.

' Further combustion takes place in the chamber 5 and the flame with the Suspended particles 'is advanced into the secondary combustion chamber 6, where it is pocketed and deflected by the baflie 10. The downward deflection of this baffle plate checks and forces downwardly the flame and results in more particles of the fuel being arrested either to drop or to be ignited in the hot upcoming flame.

The flame now rises through the tortuous passageway between the bafiie 10 and the bridge wall 8, where it is again checked and arrested by the bafle 12, the dust particles falling downwardly on the upper surface of the baflie 10 or being further ignited in the hot flame. The flame then passes over the bridge wall 8 and is directed outwardly by the arch 14, to deliver to the heating chamber and the' plates or sheets placed therein a flame which is entirely clean and pure, the dust particles having been positively removed or ignited b the bafiie arrangement.

It is thus seen t at by my arrangement of bafile plates and tortuous passageways in the combustion chambers a clean flame is delivered to the plates and combustion is furthered to a very material extent, thereby ensuring a high degree ofa efiiciency and utility.

Without further analysis, the foregoing will so fully reveal the gist of the invention that others can, by applying current knowledge, readily adapt it for various applications without omitting certain features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic or specific aspects of this inventon and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalency of the following claims.

I claim: a i

1. In a furnace for pulverized fuel, the combination of a combustion chamber and means in said combustion chamber to remove suspended, non-ignited fuel and dust particles from the flame, said means comprising a plurality of downwardly deflecting walls arranged therein.

2. In a furnace for pulverized fuel, the combination of a combustion chamber and means comprising apluralty of alternately arranged and downwardly deflecting baffle walls arranged in said combustion chambers whereby Suspended fuel and dust particles are removedfrom the flame.

3. In a furnace for ulverized fuel, in

secondary combustion chamber receving the hot gases and flame from said primary combustion chamber, and means in said secondary combustion chamber to ensure a clean flame passing to said heating chamber, said means comprising downwardly deflecting baflle plates whereby dust or fuel particles in suspension are defiected downwardly.

5. In a furnace for pulverized fuel, ,in combination, a heating chamber, an ignition chamber, a primary combustion chamber separated therefrom by a baffle wall, a

secondary combustion chamber receiving the hot gases and flame from said primary combuston chamber, and means in sad secondary combuston ehamber to ensure a clean flame passing to said heating chamber, said means comprsing downwardly defieeting baffle plates arranged therein and postioned to provide a tortuous passageway for said flame and Suspended fuel carred thereby. 6. A sheet or plate furnace comprising a heating chamber and an ignition chamber, means for supplyng pulverzed fuel to said igniton chamber, a primary conbuston chambe-r separated from said i nition chamber by a baffie Wall, a seconary combuston chamber receiving the flame and suspended fuel therein from said primary combustion chamber, a bridge separatng said secondary combuston ehamber froni said heating chamber, and downwardly defieeting baflie walls arranged in said seeondary combustion chamber whereby the fuei and dust partieles Suspended in the flame are pocketed and defieeted. 7. A sheet or plate furnace comprisng a heating chamber and an igniton chamber,

means for supplying pulverized fuel to said ignton chamber, a primary cmbustion chamber separated from said gnton chamber by a battle Wall, a secondary combustion chamber receivng the flame and Suspended fuel ther-ein from said prmary combuston i chamber, a bridge separating said seeondary combustion ehamber from 'said heating ehamber, and downwardiy defiectng baffie walls arranged alternately on the furnace and on said bridge Wall Whereby supended parteles of fuel and dust carred thereby are deflected through a tortuous passage- Way.

8. In a furnace for pulverzed fuel, the combination of eombuston chambers and a pluralty of defiecting baflie walls arranged therein to defiect and arrest dust or noni gnited fuel partieles Suspended in the fiame.

In testmony Whereof I have signed my name this 28th day of Sept., 1923.

GEORGE CLARK BROWN. 

